C2402

DTC C2402 MOTOR - ELECTRICAL

COMPONENT LOCATION
Refer to DTC C1604. C1604

GENERAL DESCRIPTION
The ABS ECU supplies battery power to the electric motor by way of a motor relay which is controlled by the Electronic Control Unit (ECU). The electric motor pump supplies hydraulic pressure to all wheel brake calipers by operating the piston inside the pump.

DTC DESCRIPTION
The ABS ECU monitors the pump motor relay or fuse open, open or short in motor or motor lock and then sets this code if a malfunction is detected.

DTC DETECTING CONDITION





MONITOR ACTUATION TEST
1. Connect scantool to Data Link Connector (DLC)
2. Ignition "ON" & Engine "OFF".
3. Select the "Actuation Test" mode on the scantool.
4. Inspect operating status of all valves with Actuation Test.





5. Does the motor operate normally?

YES
> Fault is intermittent caused by poor connection in power harness (ABS1) and/or HECU's connector or was repaired and HECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

NO
> Go to "W/Harness Inspection" procedure.

TERMINAL AND CONNECTOR INSPECTION
Refer to DTC C1101. C1101

POWER CIRCUIT INSPECTION
1. Ignition "OFF"
2. Disconnect HECU connector.
3. Ignition "ON" & Engine "OFF".
4. Measure voltage between terminal "9" of the HECU harness connector and chassis ground.





5. Is the measured voltage within specifications?

YES
> Go to "Ground Circuit Inspection" procedure.

NO
> Check for open or short in power harness between battery terminal(+) and terminal "9" of the HECU harness connector. Check for open or blown 40 A ABS2 fuse referring to "Circuit Diagram". Repair as necessary and then go to "Verification of vehicle Repair" procedure

GROUND CIRCUIT INSPECTION
1. Ignition "OFF".
2. Check for open or short in power harness between battery terminal(+) and terminal "9" of the HECU harness connector. Check for open or blown 40A ABS2 fuse referring to "Circuit Diagram". Repair as necessary and then go to "Verification of vehicle Repair" procedure.

Specification: Approximately below 1 ohm





3. Is the measured resistance within specifications?

YES
> Go to "Component Inspection" procedure.

NO
> Check for damaged harness and poor connection between terminal "8, 24" of the HECU harness connector and chassis ground. Repair as necessary and then go to "Verification of vehicle Repair" procedure.

COMPONENT INSPECTION
1. Ignition "OFF".
2. Engine "ON".
3. Start and drive vehicle in gear and maintain vehicle speed is approximately 7.46 mph or more (7 mph or more)
4. Does warning lamp remain On?

YES
> Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "Verification of Vehicle Repair" procedure.

NO
> Fault is intermittent caused by open or short of power harness (ABS2) and/or faulty HECU or was repaired and HECU memory was not cleared. Go to the applicable troubleshooting procedure.

VERIFICATION OF VEHICLE REPAIR
Refer to DTC C1200. C1200